void
Process_upnphttp(struct upnphttp * h)
{
char * h_tmp;
char buf[2048];
int n;
if(!h)
return;
switch(h->state)
{
case EWaitingForHttpRequest:
#ifdef ENABLE_HTTPS
if(h->ssl) {
n = SSL_read(h->ssl, buf, sizeof(buf));
} else {
n = recv(h->socket, buf, sizeof(buf), 0);
}
#else
n = recv(h->socket, buf, sizeof(buf), 0);
#endif
if(n<0)
{
#ifdef ENABLE_HTTPS
if(h->ssl) {
int err;
err = SSL_get_error(h->ssl, n);
if(err != SSL_ERROR_WANT_READ && err != SSL_ERROR_WANT_WRITE)
{
syslog(LOG_ERR, "SSL_read() failed");
syslogsslerr();
h->state = EToDelete;
}
} else {
#endif
if(errno != EAGAIN &&
errno != EWOULDBLOCK &&
errno != EINTR)
{
syslog(LOG_ERR, "recv (state0): %m");
h->state = EToDelete;
}
/* if errno is EAGAIN, EWOULDBLOCK or EINTR, try again later */
#ifdef ENABLE_HTTPS
}
#endif
}
else if(n==0)
{
syslog(LOG_WARNING, "HTTP Connection closed unexpectedly");
h->state = EToDelete;
}
else
{
const char * endheaders;
/* if 1st arg of realloc() is null,
* realloc behaves the same as malloc() */
h_tmp = (char *)realloc(h->req_buf, n + h->req_buflen + 1);
if (h_tmp == NULL)
{
syslog(LOG_WARNING, "Unable to allocate new memory for h->req_buf)");
h->state = EToDelete;
}
else
{
h->req_buf = h_tmp;
memcpy(h->req_buf + h->req_buflen, buf, n);
h->req_buflen += n;
h->req_buf[h->req_buflen] = '\0';
}
/* search for the string "\r\n\r\n" */
endheaders = findendheaders(h->req_buf, h->req_buflen);
if(endheaders)
{
/* at this point, the request buffer (h->req_buf)
* is guaranteed to contain the \r\n\r\n character sequence */
h->req_contentoff = endheaders - h->req_buf + 4;
ProcessHttpQuery_upnphttp(h);
}
}
break;
case EWaitingForHttpContent:
#ifdef ENABLE_HTTPS
if(h->ssl) {
n = SSL_read(h->ssl, buf, sizeof(buf));
} else {
n = recv(h->socket, buf, sizeof(buf), 0);
}
#else
n = recv(h->socket, buf, sizeof(buf), 0);
#endif
if(n<0)
{
#ifdef ENABLE_HTTPS
if(h->ssl) {
int err;
err = SSL_get_error(h->ssl, n);
if(err != SSL_ERROR_WANT_READ && err != SSL_ERROR_WANT_WRITE)
{
syslog(LOG_ERR, "SSL_read() failed");
syslogsslerr();
h->state = EToDelete;
}
} else {
#endif
if(errno != EAGAIN &&
errno != EWOULDBLOCK &&
errno != EINTR)
{
syslog(LOG_ERR, "recv (state1): %m");
h->state = EToDelete;
}
/* if errno is EAGAIN, EWOULDBLOCK or EINTR, try again later */
#ifdef ENABLE_HTTPS
}
#endif
}
else if(n==0)
{
syslog(LOG_WARNING, "HTTP Connection closed inexpectedly");
h->state = EToDelete;
}
else
{
void * tmp = realloc(h->req_buf, n + h->req_buflen);
if(!tmp)
{
syslog(LOG_ERR, "memory allocation error %m");
h->state = EToDelete;
}
else
{
h->req_buf = tmp;
memcpy(h->req_buf + h->req_buflen, buf, n);
h->req_buflen += n;
if((h->req_buflen - h->req_contentoff) >= h->req_contentlen)
{
ProcessHTTPPOST_upnphttp(h);
}
}
}
break;
case ESendingContinue:
if(SendResp_upnphttp(h))
h->state = EWaitingForHttpContent;
break;
case ESendingAndClosing:
SendRespAndClose_upnphttp(h);
break;
default:
syslog(LOG_WARNING, "Unexpected state: %d", h->state);
}
}
void
Process_upnphttp(struct upnphttp * h)
{
char buf[2048];
int n;
if(!h)
return;
switch(h->state)
{
case 0:
n = recv(h->socket, buf, 2048, 0);
if(n<0)
{
syslog(LOG_ERR, "recv (state0): %m");
h->state = 100;
}
else if(n==0)
{
syslog(LOG_WARNING, "HTTP Connection closed inexpectedly");
h->state = 100;
}
else
{
const char * endheaders;
/* if 1st arg of realloc() is null,
* realloc behaves the same as malloc() */
h->req_buf = (char *)realloc(h->req_buf, n + h->req_buflen + 1);
memcpy(h->req_buf + h->req_buflen, buf, n);
h->req_buflen += n;
h->req_buf[h->req_buflen] = '\0';
/* search for the string "\r\n\r\n" */
endheaders = findendheaders(h->req_buf, h->req_buflen);
if(endheaders)
{
h->req_contentoff = endheaders - h->req_buf + 4;
ProcessHttpQuery_upnphttp(h);
}
}
break;
case 1:
n = recv(h->socket, buf, 2048, 0);
if(n<0)
{
syslog(LOG_ERR, "recv (state1): %m");
h->state = 100;
}
else if(n==0)
{
syslog(LOG_WARNING, "HTTP Connection closed inexpectedly");
h->state = 100;
}
else
{
/*fwrite(buf, 1, n, stdout);*/ /* debug */
h->req_buf = (char *)realloc(h->req_buf, n + h->req_buflen);
memcpy(h->req_buf + h->req_buflen, buf, n);
h->req_buflen += n;
if((h->req_buflen - h->req_contentoff) >= h->req_contentlen)
{
ProcessHTTPPOST_upnphttp(h);
}
}
break;
default:
syslog(LOG_WARNING, "Unexpected state: %d", h->state);
}
}
/* Parse and process Http Query
* called once all the HTTP headers have been received,
* so it is guaranteed that h->req_buf contains the \r\n\r\n
* character sequence */
static void
ProcessHttpQuery_upnphttp(struct upnphttp * h)
{
static const struct {
const char * path;
char * (* f)(int *);
} path_desc[] = {
{ ROOTDESC_PATH, genRootDesc},
{ WANIPC_PATH, genWANIPCn},
{ WANCFG_PATH, genWANCfg},
#ifdef HAS_DUMMY_SERVICE
{ DUMMY_PATH, NULL},
#endif
#ifdef ENABLE_L3F_SERVICE
{ L3F_PATH, genL3F},
#endif
#ifdef ENABLE_6FC_SERVICE
{ WANIP6FC_PATH, gen6FC},
#endif
#ifdef ENABLE_DP_SERVICE
{ DP_PATH, genDP},
#endif
{ NULL, NULL}
};
char HttpCommand[16];
char HttpUrl[128];
char * HttpVer;
char * p;
int i;
p = h->req_buf;
if(!p)
return;
/* note : checking (*p != '\r') is enough to avoid runing off the
* end of the buffer, because h->req_buf is guaranteed to contain
* the \r\n\r\n character sequence */
for(i = 0; i<15 && *p != ' ' && *p != '\r'; i++)
HttpCommand[i] = *(p++);
HttpCommand[i] = '\0';
while(*p==' ')
p++;
for(i = 0; i<127 && *p != ' ' && *p != '\r'; i++)
HttpUrl[i] = *(p++);
HttpUrl[i] = '\0';
while(*p==' ')
p++;
HttpVer = h->HttpVer;
for(i = 0; i<15 && *p != '\r'; i++)
HttpVer[i] = *(p++);
HttpVer[i] = '\0';
syslog(LOG_INFO, "HTTP REQUEST : %s %s (%s)",
HttpCommand, HttpUrl, HttpVer);
ParseHttpHeaders(h);
if(strcmp("POST", HttpCommand) == 0)
{
h->req_command = EPost;
ProcessHTTPPOST_upnphttp(h);
}
else if(strcmp("GET", HttpCommand) == 0)
{
h->req_command = EGet;
for(i=0; path_desc[i].path; i++) {
if(strcasecmp(path_desc[i].path, HttpUrl) == 0) {
if(path_desc[i].f)
sendXMLdesc(h, path_desc[i].f);
else
#ifdef HAS_DUMMY_SERVICE
sendDummyDesc(h);
#else
continue;
#endif
return;
}
}
if(0 == memcmp(HttpUrl, "/ctl/", 5)) {
/* 405 Method Not Allowed
* Allow: POST */
h->respflags = FLAG_ALLOW_POST;
Send405(h);
return;
}
#ifdef ENABLE_EVENTS
if(0 == memcmp(HttpUrl, "/evt/", 5)) {
/* 405 Method Not Allowed
* Allow: SUBSCRIBE, UNSUBSCRIBE */
h->respflags = FLAG_ALLOW_SUB_UNSUB;
Send405(h);
return;
}
#endif
syslog(LOG_NOTICE, "%s not found, responding ERROR 404", HttpUrl);
Send404(h);
}
#ifdef ENABLE_EVENTS
else if(strcmp("SUBSCRIBE", HttpCommand) == 0)
{
h->req_command = ESubscribe;
ProcessHTTPSubscribe_upnphttp(h, HttpUrl);
}
else if(strcmp("UNSUBSCRIBE", HttpCommand) == 0)
{
h->req_command = EUnSubscribe;
ProcessHTTPUnSubscribe_upnphttp(h, HttpUrl);
}
#else
else if(strcmp("SUBSCRIBE", HttpCommand) == 0)
{
syslog(LOG_NOTICE, "SUBSCRIBE not implemented. ENABLE_EVENTS compile option disabled");
Send501(h);
}
#endif
else
{
syslog(LOG_NOTICE, "Unsupported HTTP Command %s", HttpCommand);
Send501(h);
}
}
/* Parse and process Http Query
* called once all the HTTP headers have been received. */
static void
ProcessHttpQuery_upnphttp(struct upnphttp * h)
{
char HttpCommand[16];
char HttpUrl[128];
char * HttpVer;
char * p;
int i;
p = h->req_buf;
if(!p)
return;
for(i = 0; i<15 && *p != ' ' && *p != '\r'; i++)
HttpCommand[i] = *(p++);
HttpCommand[i] = '\0';
while(*p==' ')
p++;
for(i = 0; i<127 && *p != ' ' && *p != '\r'; i++)
HttpUrl[i] = *(p++);
HttpUrl[i] = '\0';
while(*p==' ')
p++;
HttpVer = h->HttpVer;
for(i = 0; i<15 && *p != '\r'; i++)
HttpVer[i] = *(p++);
HttpVer[i] = '\0';
syslog(LOG_INFO, "HTTP REQUEST : %s %s (%s)",
HttpCommand, HttpUrl, HttpVer);
ParseHttpHeaders(h);
if(strcmp("POST", HttpCommand) == 0)
{
h->req_command = EPost;
ProcessHTTPPOST_upnphttp(h);
}
else if(strcmp("GET", HttpCommand) == 0)
{
h->req_command = EGet;
if(strcmp(ROOTDESC_PATH, HttpUrl) == 0)
{
sendXMLdesc(h, genRootDesc);
}
else if(strcmp(WANIPC_PATH, HttpUrl) == 0)
{
sendXMLdesc(h, genWANIPCn);
}
else if(strcmp(WANCFG_PATH, HttpUrl) == 0)
{
sendXMLdesc(h, genWANCfg);
}
#ifdef HAS_DUMMY_SERVICE
else if(strcmp(DUMMY_PATH, HttpUrl) == 0)
{
sendDummyDesc(h);
}
#endif
#ifdef ENABLE_L3F_SERVICE
else if(strcmp(L3F_PATH, HttpUrl) == 0)
{
sendXMLdesc(h, genL3F);
}
#endif
else
{
syslog(LOG_NOTICE, "%s not found, responding ERROR 404", HttpUrl);
Send404(h);
}
}
#ifdef ENABLE_EVENTS
else if(strcmp("SUBSCRIBE", HttpCommand) == 0)
{
h->req_command = ESubscribe;
ProcessHTTPSubscribe_upnphttp(h, HttpUrl);
}
else if(strcmp("UNSUBSCRIBE", HttpCommand) == 0)
{
h->req_command = EUnSubscribe;
ProcessHTTPUnSubscribe_upnphttp(h, HttpUrl);
}
#else
else if(strcmp("SUBSCRIBE", HttpCommand) == 0)
{
syslog(LOG_NOTICE, "SUBSCRIBE not implemented. ENABLE_EVENTS compile option disabled");
Send501(h);
}
#endif
else
{
syslog(LOG_NOTICE, "Unsupported HTTP Command %s", HttpCommand);
Send501(h);
}
}
